The two young attackers have battled with form and fitness in their first season at Hill Dickinson stadium.
Moyes said: “Merlin, we like, Tyler, we like.
"Tyler, we're giving more time to because of his age. Merlin could have easily been involved in some more games and played a little bit more time.
"It'll do him no harm to have sat back for the best part of the season and looked at it. No, we like them, they're both good boys.”
Moyes added: “The team has been doing pretty well, so they've (the wider squad) not been required that often. It's always the ones who are not in who are the ones who you think can do a better job, so it's one of those things.”
